Abstract: A data processing system includes a plurality of processing units coupled for communication. The plurality of processing units includes at least a local hub and a local master. The local master includes a master that issues a request for access to a memory block and interconnect logic coupled to at least one communication link coupling the local master to the local hub. The interconnect logic includes partial response logic that synchronizes internal transmission of a first partial response of a snooper to the request with receipt, via the at least one communication link, of a second partial response to the request from the local hub.

Abstract: A cache coherent data processing system includes a memory and at least first and second coherency domains that each include a respective one of first and second cache memories. A master in the first coherency domain selects a scope of an initial broadcast of an operation targeting a request address allocated to the memory from among a first scope including only the first coherency domain and a second scope including both the first and second coherency domains. The master selects the scope based, at least in part, upon whether the memory belongs to the first coherency domain and performs an initial broadcast of the operation within the cache coherent data processing system utilizing the selected scope.